Advantages of Weld-Thru Primer: - Reduces prep time when welding new parts to new parts that are both covered in the weld thru primer - Reduced spatter - Lower distortion of the panels - Superior conductive properties that help minimize high heat zone problems - Eliminates corrosion that would form between overlapped panels or multi-layered spot welds - Helps when welding a new panel to old metal - Lower resistance at the weld surface allows better penetration into the denser, new steel that helps forgive an old alloy's problems with porosity and impurities - Helps prevent resin build up between welds that can trap moisture in the old porous steel that leads to failure at the weld borders